Welding machine



Filed Aug. 18, 1938 3 Sheets-Sheet l I Ill... .lllJ

INVENTOR BY fr ATTORNE Feb. 11, C. EISLER 2,231,617

WELDING MACHINE Filed Aug. 18, 1938 s sheets-sheet 2 BY INVENTOR I, i l

ATToRNl Feb. 1941. Q EISLR 2,231,617

WELDING .MACHINE Filed Aug. 18, 1958 5 Sheets-Sheet 5 iNvENcgR BY 77M; ATTORNE Patented Feb. All, 1941l UNITEDl STATI-:s PATENT OFFICE wannmo mom.

Charles Eisler, South Orange, N. J. appunti@ samt 1s, 193s. serai No. 225,525

' 1 claim. (ci. 21a-4) This invention relates to -an improved welding machine having adjustable horns which can be shifted to accommodate dinerent sizes of sheets or pieces whereby more eii'ective and rapid `weld- 8 ing can be accomplished.

A further advantage of such adjustable horns is to vary the heat of the electrodes by thus increasing or decreasing the secondary loop re- `actance. In using the horns to vary the heat of 10 the electrodes, taps are placed in the primary of' the welding transformer. for further heat control separation of the pivots of the horns in addition 415 to an adjusted length to provide a still greater scope of adjustment in order to accommodatea 3 is a vertical section on Figure l taken in front of the base of the machine and looking toward 25 the machine. Figure 4 is a top view of the machine shown in Figure 1.- Figure 5-is aside view of a modiiled form of machine. Figure 6 is a vertical section taken in front of the' machine shown in Figure 5.- 3 The machine that 1s uiustrated is or mev fabricated steel box type forming a base I having a floor plate II and having the customary transformer supported on the inside, the primary coil I2 being connected to the main circuit by the wires 1 and u, the sewndsrycou 15 having taps I8 and-I1 connected to the electrodes as hereinatter described.

The machine is provided with two welding horns I8 and I8. -The horn I8 is secured in a 0 ciamp bearing or clamp bearings n; the bqlt 2| in each bearing causing the split bearing to tightly clamp the hom I8 in place, but permitting longitudinal adjustment ofthe horn when the" bolt 2| is loosened. I'his form of clamp can be 5 varied to suit requirements.

The horn I 3 issecured in a clamp bearing 22 and held against movement by the pressure of the bearing due to the 'nut 23. When the nut 23 is released thehorn I8 can be longitudinally ad- 50 justed. 'I'he clamp bearing is supported so that it can rock and it is shown supportedon a shaft 24a supported in the bearings 24 on each side oi the top of the base i3 and thus allowing the support of the upper horn to straddle the clamp I8 oi the lower ho y'I'.he machine also provides for an adjustable.

'I'he horns are supplied at their ends with weld- .ing tips 25. The horns are-hollow and so are the tips .to provide a channel for cooling tluid and for a iluid supply pipe. 'I'he hollow bore 28 of the horn is connectedwith the outlet water 5 pipev 21 and the water inlet pipe 28 is supplied through the pipe 23. The inlet pipe 28 terminates short of the hollow pai-t3!) of the tip 25 and this system maintains the horns at proper temperature. y The upper horn is shown connected to theAtap I1 of the transformer at 3| and the lower horn is shown connected to the tap 'I6 at 32.

The rocking of the horn I8 to bring about weldingcontact of the tips is shown as caused -15 by a rod 33 pivotally connected at 34 to the horn I8 and actuated from a solenoid in a cylinder 35 which cylinder may rock, as at the pivot 38 to compensate for the-movement of the rod 33. The

solenoid 'is operated from the foot button v3`| 20* which is connected by contacts with the solenoid.

'I'his mechanism is not essential and is not new and a simple foot lever construction can be used if desired:

Ac modiiled form of construction is shown in 25 Figures 5 and 6 which construction providesa further range of adjustment between the tips oi' the horns. The upper horn I8 and the lower horn I8 are the same as before described but they are. mounted in a diiferent way.l The horns are disposed to one side of the base Ill and the upper horn rocks asin the prior construction herein described while the lower horn is held in] clamp bearings that are vertically adjustable on the base to lvary the distance from the bearing of the The lower horn I8 is secured in clamp bearings 38 which bearingsare adjustable by reason of the bolts 33. which hold the bearings in place. being slidable in slots 40 in the plates 4| on the side 40 of the base I 3. The plates 4| are sh'own as the insulating supportof the horns. The upper horn i8 is held in a clamp bearing 42 which is secured on a shaft 43 which can rock in the bearings 44 to nt the .particular lob. This ilexibility and convenience in using the machine is possible by reason of the construction which extends the ends of the horns beyond the limits-oi the machine base, giving greater scope of adjustment, and also accessibility for inspection, adjustment and repair.

In addition to this the heat at the electrodes may be veried over a Wide range through a large number of steps. The horns are shown marked to indicate the proper places for setting the horns, the markings showing the principal ratings, namely from 50 to 25 k. v. a. The adjustment to the proper rating coupled with use of the taps in 

